REAR SUNSHADE SYSTEM Rear Sunshade Shift-linked Function does not Operate when Shift Lever is Moved to R Position

SYSTEM DESCRIPTION

When the engine switch is on (IG) and the rear sunshade is raised, moving the shift lever to R causes the park/neutral position switch assembly to send a reverse-linked signal to the ECM. Then the ECM sends the signal through the CAN communication line to the main body ECU (multiplex network body ECU), which sends the signal to the rear sunshade relay. The rear sunshade relay then lowers the rear sunshade.

Tech Tips

The reverse-linked function of the rear sunshade system only operates when it has been set to "ON" using the customize function of the GTS (the default setting is "ON").

WIRING DIAGRAM

A01FEWWE01

INSPECTION PROCEDURE

Note


  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

  • Do not remove the ground bolt of the rear window shade assembly.

  • When the rear sunshade relay is replaced with a new one, do not use the wire harness packaged together with the new rear sunshade relay.

Tech Tips

Since the rear sunshade system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

PROCEDURE


  1. READ VALUE USING GTS (SHIFT SW STATUS [R RANGE])


    1. Using the GTS, read the Data List Click here.

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Shift SW Status (R Range)

      Park/neutral position switch assembly status (R Range) /

      ON or OFF

      • ON: Shift lever in R

      • OFF: Shift lever not in R

      		 When the shift lever position displayed on the GTS differs from the actual position, the adjustment of the park/neutral position switch assembly may be incorrect.
      OK
      GTS display changes correctly according to shift lever operation.
      Result
      Result Proceed to
      OK A
      NG (for AA81E) B
      NG (for A760E) C
      NG (for A960E) D

    B

    GO TO AUTOMATIC TRANSMISSION SYSTEM Click here

    C

    GO TO AUTOMATIC TRANSMISSION SYSTEM Click here

    D

    GO TO AUTOMATIC TRANSMISSION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (REVERSE GEAR SIGNAL)


    1. Make sure that the rear sunshade lowers.

    2. Select the Active Test, use the GTS to generate a control command, and then check that the rear sunshade can be lowered.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Reverse Gear Signal Reverse signal output control ON / OFF -
      OK
      Rear sunshade can be lowered.

    NG

    CHECK HARNESS AND CONNECTOR (REAR WINDOW SHADE ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU]) Click here

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  3. CHECK HARNESS AND CONNECTOR (REAR WINDOW SHADE ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Disconnect the U29 rear window shade assembly connector.

    2. Disconnect the N12 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      U29-3 (REV) - N12-15 (REV) Always Below 1 Ω
      U29-3 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK REAR WINDOW SHADE ASSEMBLY


    1. A01FEGFE01
      Text in Illustration
      *a

      Component without harness connected

      (Rear Window Shade Assembly)
      *b

      Component without harness connected

      (Rear Sunshade Relay)

      Disconnect the rear window shade assembly connector.

    2. Disconnect the rear sunshade relay connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      U29-3 (REV) - A-6 (REV) Always Below 1 Ω
      U29-3 (REV) - Body ground Always 10 kΩ or higher

    NG

    REPLACE REAR WINDOW SHADE ASSEMBLY Click here

    OK

  5. CHECK REAR SUNSHADE RELAY


    1. A01FHP9E01
      Text in Illustration
      *a

      Component with harness connected

      (Rear Window Shade Assembly)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      B-2 (MR) - B-1 (ME) Rear sunshade is fully raised and shift lever is moved from N to R 11 to 14 V

    NG

    REPLACE REAR SUNSHADE RELAY Click here

    OK

    REPLACE REAR WINDOW SHADE ASSEMBLY Click here